Facebook and Instagram ads for UK small businesses: cost, budget and whether they work

Are Facebook ads worth it for a small business?

They are worth a small test when people who click can enquire easily and you can count the enquiries. I found no UK study of what small businesses get back from Meta ads, and I will not guess a figure. Meta, the company behind Facebook and Instagram, runs both on one system called Ads Manager.

Ads also cost money before they produce anything. The sections below cover what you pay, why the first week behaves differently and the rules that limit some businesses.

How are Facebook and Instagram ads charged?

You set a budget, and Meta usually charges by impressions, which means each time your ad is shown, unless you choose a different way to be charged. Meta bills in one of two ways. Automatic billing charges your payment method when your spend reaches a payment threshold. Prepaid billing uses funds you add in advance.

Meta’s own help page quotes minimum budgets in US dollars, says they vary by country and by objective, and says Ads Manager warns you when a budget is too low. I found no official minimum in pounds, so I do not give one.

What is the 2% UK location fee, and what about VAT?

Meta adds a 2% location fee on top of your budget for ads delivered to people in the UK. The fee is based on where your ads are shown, not where your business is. It is separate from your budget, added after delivery, and can take the total above the budget you set. It appears as its own line on the invoice. Meta lets you exclude countries for the whole ad account, but says it cannot guarantee this lowers the fee, and a business selling to UK customers would not want to exclude the UK anyway. Meta’s page gives no start date.

VAT depends on who sold you the ads. If the invoice says “Sold by” Meta Platforms Ireland and you buy for business, Meta adds no VAT and you account for it yourself at the UK rate, which is called self-assessing. If a local Meta company sold the ads, VAT is added, and a VAT-registered business can probably recover it. Buyers who are not a business pay VAT. Meta gives no tax advice, so check the “Sold by” line on your receipt and ask your accountant.

What is the learning phase, and why does it matter for a small budget?

The learning phase is the period when Meta is still working out who to show an ad set to, and results usually cost more during it. An ad set is the group of ads that share a budget and an audience. Meta says an ad set leaves learning as soon as it can deliver stably, which usually happens after about 50 results in the week after its last significant edit. If it cannot get enough results, the status reads “Learning limited”.

Meta’s advice is to avoid editing an ad set while it learns, to avoid running many ads and ad sets, to combine similar ad sets, to use a realistic budget and to avoid frequent budget changes. A small business with a small budget gains most from the fewest ad sets.

How much should I spend on Facebook ads?

Spend enough to reach about 50 results in a week, or accept that the ad set may stay in “Learning limited”. That is my arithmetic from Meta’s rule: daily budget times seven, divided by the cost of one result, should reach 50. As an example with an assumed £10 a result, which is not a UK price, 50 results is £500 a week, or about £72 a day.

Meta has a second rule for a cost per result goal, which is the price you ask Meta to aim for. Set the daily budget at least five times that goal. Meta’s own example is a goal of 5 US dollars with a daily budget of 25. With the assumed £10 goal, the daily budget would be at least £50.

If those sums are more than you can spend, start with one ad set and a narrow aim, such as one service in one town, instead of several thin ones.

Which businesses face extra rules on Meta ads?

Ads about housing, employment, financial products and services, or social issues, elections and politics go in a Special Ad Category with extra limits. Meta’s developer page lists those four. In a Special Ad Category you cannot use lookalike audiences, which are groups Meta builds to resemble your existing customers, and in Europe the targeted area must have a radius of at least 15 km. Meta stopped political ads in the EU on 6 October 2025. I did not check the position in the UK.

Most trades, salons and cafés fall outside these four. A letting agent, a recruiter or a mortgage broker would not.

What is the Conversions API?

The Conversions API is a direct connection that sends your enquiries and sales to Meta from your own website platform, server, app or customer system, so Meta can see which ads led to them. In Meta’s words it supports website, shop, phone, chat and offline events. Many integrations need no developer. Ask whoever runs your website whether your platform offers one.

When are Facebook and Instagram ads a poor fit?

They are a poor fit when clicks have nowhere good to land or when you cannot tell whether an enquiry came from the ad. Check these before spending anything.

Related: Do I need a website if I have a Facebook page?, Why visitors do not become enquiries